The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 03, 1998
Filed:
May. 16, 1989
Thomson-CSF, Puteaux, FR;
Abstract
A layer (30) absorbing transmitted radiation, placed between an antenna (10) and a radome (20) and extending parallel to the surface of the antenna at a close distance thereto, the absorption coefficient of said absorbing layer varying between a minimum value in the center of the radiating surface and a maximum value at the periphery of said radiating surface. The absorbing layer may in particular be formed by a central area (31) with a zero or virtually zero absorption coefficient surrounded by a peripheral area (32) with a constant absorption coefficient. It may also be formed by a succession of concentric areas exhibiting respective absorption coefficients increasing from the center to the periphery. In addition to the reduction of the radome effect, said structure reduces significantly the radar cross section of the assembly when the latter is the target of a radar.